FREE UK STANDARD DELIVERY ON ORDERS OVER £30

  • Arcteryx  Alpha FL 45 Backpack Black
  • Arcteryx  Alpha FL 45 Backpack Black

Arcteryx Alpha FL 45 Backpack Black

RRP £160.00 Now £144.00

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Arcteryx Alpha FL 45 Backpack Overview

The Alpha FL (Fast & Light) 45 litre backpack is no exception. Every element is carefully considered and this dedication to a design ethic turned many heads. With no extraneous materials, the Arc'teryx Alpha FL 45 sheds grams without sacrificing strength or performance. The Alpha FL pack was created for those who want a light, durable and highly weather resistant pack that is pared down to be as simple as possible. The Alpha Series of products from Arc'teryx have met the needs of serious expedition climbers and Alpinists for nearly 20 years. In a time when so many outdoor equipment manufacturers are tailoring their products for the more profitable mass-market sector, the Alpha Series remains true to its extreme environment purpose.

Features & Benefits

  • Ultralight design and construction allow climbers full functionality in a pack
  • Highly weather resistant AC² (Advanced Composite Construction) fabric, sealed seams and RollTop™ extension on the main compartment provide the ultimate protection from rain and snow
  • Glove friendly main opening with a pull to open, pull to close drawcord system
  • Small external WaterTight™ zippered pocket with key clip
  • 4 integrated side lash points and 6 on the front for lashing extra gear to the pack's exterior such as sleeping pads or skis
  • External bungee compression system can carry crampons, up to 4 ice tools or a bulky belay parka
  • Shoulder strap and sternum strap have been revised for a better fit
  • Top rope strap buckle is now anchored on the back panel for easier use
  • N400r-AC² nylon 6 ripstop
  • N100mr-HT nylon 6,6 mini-ripstop (primary collar)
  • N70r-HT nylon 6,6 ripstop (extension collar)
  • HD 80 foam
  • Burly™ Double Weave
  • HyPUR-cel® foam
  • Weight: 650g / 23 oz

Delivery and Returns

UK Standard Delivery

  • We usually use Royal Mail - tracking reference can be followed here.
  • Deliveries will usually be made within 3-5 working days after you place your order [excluding Weekends]
  • UK Standard Delivery is Free for orders over £30 (£5 for orders under £30) and your order will be sent out via the most suitable carrier, depending on size and weight.
  • Your order can be delivered anytime between 7am and 9pm and a signature may be required on receipt.
  • If you are not around to take delivery of your parcel, the carrier will leave a calling card telling you how you can pick it up.
  • Unfortunately we cannot deliver on a bank holiday. In this instance please expect your delivery on the next working day.

UK Next Day Delivery

  • If you require a specific delivery day (other than standard next day delivery) or have an urgent delivery requirement please contact our Customer Services team.
  • The following are details of our UK Next Day Delivery (up to 2kg) service:
  • If you order by 2pm, Monday to Thursday, you will receive your goods the next day.
  • If you order by 2pm on Friday you will receive your goods on the following Monday.
  • If you order anytime on Saturday or on Sunday, you will receive your goods on the Tuesday.
  • Any orders placed on a Bank Holiday Weekend will be delivered 2 working days later.
  • We do not deliver on a Bank Holiday so please be aware of any impending ones when you order.
  • The cost of Next Day Delivery is £5.00 for orders over £30 (£10 for orders under £30)
  • Our carrier will deliver your parcel between 7am and 9pm. A signature will be required on receipt. If you are not around to accept your parcel a calling card will be left.
  • Next Day Delivery is not available to the following: Europe, Ireland and some parts of Scotland.

International Delivery Information

  • International shipping is charged on a flat rate basis, regardless of the weight of your parcel - maximum weight 2kg
  • Standard and Express delivery services are available for most of the countries that we ship to.
  • Shipping will be automatically calculated at the checkout page when both the delivery destination and service option is selected.
  • The summary of delivery timescales and cost are as follows:
    • Area Standard Delivery Times In Working Days (Monday - Friday) Standard Costs
      • Americas From 7 Days £20.00
      • Europe From 5 Days £12.00
      • Rest of the World From 6 Days £20.00
  • When you place an order, we suggest you have it delivered to a work address rather than a home address, as our couriers only deliver between 9am and 5pm, and will require a signature on receipt.
  • Your order will be dispatched via the most suitable carrier, depending on size and weight.
  • For orders being sent outside the EU, VAT is deducted from the price when a non-EU delivery address is selected.
  • Any customs or import duties are charged once the parcel reaches its destination country. The recipient of the parcel must pay these charges. We have no control over these charges and cannot predict what they may be. Customs policies vary widely from country to country; you may want to contact your local customs office for further information.
  • Once your parcel has arrived in your country, it will be passed on to an internal postal service, according to standard delivery procedures.
  • If you aren't available when your parcel is delivered, the delivery driver will leave a calling card with instructions on how to pick it up.

Returns Information

  • Goods may be returned for refund or exchange within 30 days of receipt. (If you notify us within 30 days that you are returning an item you are entitled to a further 30 days from notification to return the item/s). Returned items must not be worn, soiled or damaged in any way, and must be 'as sold'. All of our stock items are dispatched with manufacturers labels/swing tags which for part of the manufacturer's warranty. This is checked before dispatch. Returns will not be accepted without these labels/tags attached. Goods returned after the returns period will not be refunded but may be credited at our discretion.Any postage charged is deemed to be separate to the contract for goods and will not be refundable.
  • You do not need to contact us to notify us of your return, unless the item is faulty or is outside of our 14-day policy and you wish to confirm that we are prepared to credit you.
  • Goods must be packaged securely to ensure they are not damaged in transit. The responsibility and liability of the goods remains with you until we are in receipt of the goods.
  • Goods are returned to us at your cost. Please include a note to say whether you wish to have an exchange or refund.
  • Customers exchanging goods will be charged the appropriate delivery charge on their new order.

  • Please return goods to:
    The Epicentre, Compston Road, Ambleside, LA22 9DR

Product Details

The Alpha FL (Fast & Light) 45 litre backpack is no exception. Every element is carefully considered and this dedication to a design ethic turned many heads. With no extraneous materials, the Arc'teryx Alpha FL 45 sheds grams without sacrificing strength or performance. The Alpha FL pack was created for those who want a light, durable and highly weather resistant pack that is pared down to be as simple as possible. The Alpha Series of products from Arc'teryx have met the needs of serious expedition climbers and Alpinists for nearly 20 years. In a time when so many outdoor equipment manufacturers are tailoring their products for the more profitable mass-market sector, the Alpha Series remains true to its extreme environment purpose.

  • Ultralight design and construction allow climbers full functionality in a pack
  • Highly weather resistant AC² (Advanced Composite Construction) fabric, sealed seams and RollTop™ extension on the main compartment provide the ultimate protection from rain and snow
  • Glove friendly main opening with a pull to open, pull to close drawcord system
  • Small external WaterTight™ zippered pocket with key clip
  • 4 integrated side lash points and 6 on the front for lashing extra gear to the pack's exterior such as sleeping pads or skis
  • External bungee compression system can carry crampons, up to 4 ice tools or a bulky belay parka
  • Shoulder strap and sternum strap have been revised for a better fit
  • Top rope strap buckle is now anchored on the back panel for easier use
  • N400r-AC² nylon 6 ripstop
  • N100mr-HT nylon 6,6 mini-ripstop (primary collar)
  • N70r-HT nylon 6,6 ripstop (extension collar)
  • HD 80 foam
  • Burly™ Double Weave
  • HyPUR-cel® foam
  • Weight: 650g / 23 oz

Delivery and Returns

UK Standard Delivery

  • We usually use Royal Mail - tracking reference can be followed here.
  • Deliveries will usually be made within 3-5 working days after you place your order [excluding Weekends]
  • UK Standard Delivery is Free for orders over £30 (£5 for orders under £30) and your order will be sent out via the most suitable carrier, depending on size and weight.
  • Your order can be delivered anytime between 7am and 9pm and a signature may be required on receipt.
  • If you are not around to take delivery of your parcel, the carrier will leave a calling card telling you how you can pick it up.
  • Unfortunately we cannot deliver on a bank holiday. In this instance please expect your delivery on the next working day.

UK Next Day Delivery

  • If you require a specific delivery day (other than standard next day delivery) or have an urgent delivery requirement please contact our Customer Services team.
  • The following are details of our UK Next Day Delivery (up to 2kg) service:
  • If you order by 2pm, Monday to Thursday, you will receive your goods the next day.
  • If you order by 2pm on Friday you will receive your goods on the following Monday.
  • If you order anytime on Saturday or on Sunday, you will receive your goods on the Tuesday.
  • Any orders placed on a Bank Holiday Weekend will be delivered 2 working days later.
  • We do not deliver on a Bank Holiday so please be aware of any impending ones when you order.
  • The cost of Next Day Delivery is £5.00 for orders over £30 (£10 for orders under £30)
  • Our carrier will deliver your parcel between 7am and 9pm. A signature will be required on receipt. If you are not around to accept your parcel a calling card will be left.
  • Next Day Delivery is not available to the following: Europe, Ireland and some parts of Scotland.

International Delivery Information

  • International shipping is charged on a flat rate basis, regardless of the weight of your parcel - maximum weight 2kg
  • Standard and Express delivery services are available for most of the countries that we ship to.
  • Shipping will be automatically calculated at the checkout page when both the delivery destination and service option is selected.
  • The summary of delivery timescales and cost are as follows:
    • Area Standard Delivery Times In Working Days (Monday - Friday) Standard Costs
      • Americas From 7 Days £20.00
      • Europe From 5 Days £12.00
      • Rest of the World From 6 Days £20.00
  • When you place an order, we suggest you have it delivered to a work address rather than a home address, as our couriers only deliver between 9am and 5pm, and will require a signature on receipt.
  • Your order will be dispatched via the most suitable carrier, depending on size and weight.
  • For orders being sent outside the EU, VAT is deducted from the price when a non-EU delivery address is selected.
  • Any customs or import duties are charged once the parcel reaches its destination country. The recipient of the parcel must pay these charges. We have no control over these charges and cannot predict what they may be. Customs policies vary widely from country to country; you may want to contact your local customs office for further information.
  • Once your parcel has arrived in your country, it will be passed on to an internal postal service, according to standard delivery procedures.
  • If you aren't available when your parcel is delivered, the delivery driver will leave a calling card with instructions on how to pick it up.

Returns Information

  • Goods may be returned for refund or exchange within 30 days of receipt. (If you notify us within 30 days that you are returning an item you are entitled to a further 30 days from notification to return the item/s). Returned items must not be worn, soiled or damaged in any way, and must be 'as sold'. All of our stock items are dispatched with manufacturers labels/swing tags which for part of the manufacturer's warranty. This is checked before dispatch. Returns will not be accepted without these labels/tags attached. Goods returned after the returns period will not be refunded but may be credited at our discretion.Any postage charged is deemed to be separate to the contract for goods and will not be refundable.
  • You do not need to contact us to notify us of your return, unless the item is faulty or is outside of our 14-day policy and you wish to confirm that we are prepared to credit you.
  • Goods must be packaged securely to ensure they are not damaged in transit. The responsibility and liability of the goods remains with you until we are in receipt of the goods.
  • Goods are returned to us at your cost. Please include a note to say whether you wish to have an exchange or refund.
  • Customers exchanging goods will be charged the appropriate delivery charge on their new order.

  • Please return goods to:
    The Epicentre, Compston Road, Ambleside, LA22 9DR

Size Guide

Men's

Trousers

Size XS S M L XL XXL
Waist 28” 30” 32” 34” 36” 38”
Leg Length Short Regular Long
  30” 32” 34”

Chest sizing varies widely depending on the garment, brand or range. Instead we have outlined below a few of the main types of fit found in our ranges and how they compare.

Women's

All of our women's clothing is shown in UK sizes but many of our brands use US sizing too, for reference we have included a rough conversion.

  XXS XS S M L XL XXL
UK 6 8 10 12 14 16 18
US 2 4 6 8 10 12 14

Footwear

All of our footwear is shown in UK sizes but some of our brands do also use European and US sizing. Converting from UK to European sizing is not exact and varies between brands. The table below is a rough guide only. If in doubt, contact us.

Men's

UK 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14
US 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15
EU 41 41.5 42 42.5 43 43.5 44.5 45 45.5 46 46.5 47 47.7 48 48.5

Women's

UK 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5
US 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 11 11.5
EU 35.5 36 36.5 37 37.5 38 38.5 39 39.5 40 40.5 41