Sierra Designs Flex Lumbar 3ā6L ā Expandable Waist Pack for Hiking & Travel
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Sierra Designs Flex Lumbar 3ā6L ā Expandable Waist Pack for Hiking & Travel
Sierra Designs Flex Lumbar 3ā6L ā Expandable Waist Pack for Hiking & Travel
Small in size but mighty in skill, the Flex Lumbar 3-6 pack is a smaller, hip-sized version of our Flex Capacitor backpack for day hikes, bike rides and casual outings. Thanks to our expanding gusset innovation, flexible carrying capacity comes naturally. Loosen it up to get extra space for bulky layers, snacks and trail accessories, or cinch it down to stabilize smaller loads. Two elastic mesh pockets on the sides fit most water bottles, and plush padding on the hip belt straps makes this low-back pack a comfortable, low-profile companion for many body shapes.
Features
- Stretch mesh water bottle pockets
- Zippered valuables pocket
- 1 main compartment, 1 hidden top zipper
- Vertically expandable volume
- Dual compression straps to stabilize load
- Padded hip belt for on-trail comfort
Materials
- 100D Nylon-Poly Ripstop
Tech Specs
- Capacity: 3-6 liters / 183-366 in3
- Weight: 8 oz / .23 kg
- Hip fit: 52" / 132 cm max
- Dimensions (H x W x D): 6" x 10" x 5" / 15.2 x 25.4 x 12.7 cm
- SKU:Ā 80711520PT
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Delivery
We aim to dispatch all in-stock orders within 1 working day (MondayāFriday, excluding Bank Holidays).
Free UK Mainland Delivery on orders over £30
- Orders placed before 2pm are dispatched same day where possible
- Orders placed after 2pm are dispatched the next working day
- Orders placed after 2pm Friday or over the weekend ship on Monday
- Orders under £30 are charged £3.95
Oversized & Remote Areas
- Large items (e.g. surfboards, sit-on-top kayaks): £19.95
- Some UK postcodes (Highlands & Islands) incur a £15 surcharge
International Delivery
- EU delivery from Ā£20 (3ā7 working days)
- Rest of world from Ā£35 (3ā7 working days)
Local VAT, customs duties, or import charges may apply to international orders and are the responsibility of the customer.
Returns FAQs
Can I return an item if I change my mind?
Yes. You can return your order within 14 days of delivery. Items must be unused, in original condition, with all packaging and tags intact.
How do I start a return?
Email info@s2as.com with your order number and reason for return. Weāll reply with return instructions.
How long do I have to return an item?
Let us know if you would like to return your item within 14 days. Once youāve notified us (within 14 days), you have a further 14 days to return the item, so 28 days in total.
Do I need to pay for return postage?
Yes. Return postage costs are the responsibility of the customer unless the item is faulty or incorrect.
Will I get a refund for the original delivery cost?
Original delivery costs are non-refundable for unwanted items. Faulty or incorrect items will receive a full refund including original delivery costs.
What if my item is faulty or damaged?
Please contact us as soon as possible with photos. If confirmed faulty, weāll arrange a replacement or full refund.
When will I receive my refund?
Refunds are processed within 5 working days of us receiving and inspecting the return. Banks may take additional time to show the funds.
What if my return is lost in transit?
Returned items remain the customerās responsibility until received by us. We recommend using a tracked service.
Can I exchange an item?
Yes. Let us know when you contact us and weāll do our best to arrange an exchange.
Contact
Email: info@s2as.com
Phone: 01202 738 448
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Price Match
At Surface 2 Air Sports (S2AS), we believe you shouldnāt have to choose between the best price and the best service. If you find the same product cheaper elsewhere from an authorised UK retailer ā weāll match it.
How Our Price Match Works
- Find the identical product at a lower price (UK authorised retailer).
- Send us the details using the form below before checkout.
- Weāll verify it and confirm quickly.
Price Match Conditions
- Product must be identical (brand, model, size, colour, year).
- Competitor must be a UK-based authorised retailer.
- Item must be in stock and available for immediate purchase.
- Competitor price must include VAT and delivery.
- Request must be made before completing your order.
What We Donāt Match
- Marketplace sellers (Amazon, eBay, Facebook Marketplace).
- Private sellers or clearance errors.
- Members-only, bundle, or finance-only promotions.
- Used, refurbished, or ex-display items.
Found a Better Price?
Send us the details and weāll take care of the rest.
Price Match Request Form
Price Match FAQs
How long does a price match take?
Most requests are reviewed within one business day, often faster during opening hours.
Do you price match after purchase?
No ā all price match requests must be submitted before checkout.
Does the competitor have to be UK-based?
Yes, the retailer must be UK-based and an authorised brand stockist.
Does shipping count in the price?
Yes ā we compare the total price including VAT and delivery.
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Price Match Contact Form
Found an item cheaper elsewhere? we want to know send it to us, So we can look at matching the price for you with the Service you expect from S2AS.


