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Stem Cell Dry

Waterproof stem-mounted bottle/ accessory bag with roll-top for easy on-the-go access during your bikepacking adventures

Stem Cell Dry

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A waterpoof roll top stem bag for quick and easy access to trail mix, fuel gels, a camera or water bottle right from your cockpit.

Based on our regular Stem Cell this Dry version has a fully taped drybag insert and a roll-top closure for even greater weather protection. This style will appeal to those on expeditions or looking for a greater degree of weather proofness. It has a fully waterproof liner made from the same material as our Airlok dry bags. With a roll top closure you don't need to hide under a bridge or worry about your equipment getting wet when the heavens open.

Constructed from bombproof VX21 fabric, Stem Cells are lightweight but padded to protect their contents. Stem Cell is the perfect place to store a MytiMug 650 for space-saving cookpot carrying system. The roll-top closure is tapered for ease of access and also makes a 13 cm extension tube making it a great fit for a 600 ml water bottle or a 750 ml Nalgene bottle.

A versatile webbing ladder is bar tacked around the Stem Cell Dry to provide multiple attachment points. Secure in place either side of your flight deck with the VELCRO® Brand straps provided, you can even double up and share your VELCRO® Brand straps for double the capacity.

Webbing colour change

For a short time production of this product will be with black webbing instead of the grey featured in the photography. This is a temporary measure until we take delivery of grey webbing next month. If you absolutely need grey webbing please let us know when you place your order using the notes field. This may delay your order.

Key features
  • 25 Year Alpine Bond
  • Outer made from durable and highly water resistant VX21
  • Lighweight: 75 g
  • Roll-top closure with fully taped liner
  • Velcro straps included
  • Made in our own UK workshop by bikers, climbers and paddlers
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Vital stats

Weight: 75 g
Width: 9 cm
Min Height: 14 cm
Max height: 27 cm

Origin: United Kingdom

Free UK Shipping on all orders

Free 2 day delivery to UK addresses is included in all orders so the price you see is the price you pay. Upgrade to next day at the checkout.

Free No hassle 123 Day Returns

Buy with confidence and if you are not happy, change your mind or want a swap for any reason then return it for free and we will exchange or refund no question. The price you see is the price you pay. Just return the kit as you receive it - in its original condition, unused, unworn, with original packaging and fit for resale.


We offer a range of finance options from 0% to 9.9% starting on orders over £500. Please give us a call on 01773 417007 to apply for finance. Our customer support heros will take your order and talk you through the quick and easy application process.

Alpine Bond

If one of our products does not meet your expectations upon delivery or, if it does not live up to the demands placed upon it, please return it within 3 years of purchase for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction if it’s your fault then we will help out the best we can.
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2 Reviews


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Mike F
Stem Cell Dry

Excellent bit of kit wizardry as usual from ALPKIT. I have used this for months now in all sorts of weather and not once has it leaked or let me down. I have had no problem with the inner liner as another reviewer mentioned. I use it store my phone, keys, bike tool and the all important Haribo's. Despite some cruddy rides I just let the bag dry out naturally and then brush off the dried mud with a soft toothbrush. Comes up a treat. Fab bit of kit for the price. 5 stars from me.

Andy Pryke
2 day outing in the Alps

Was really expecting these to be good, but afraid not.
3 Gripes
1 - the lack of a round base, unlike the regular stem cell, means they do not pack as well (Its really square)
2. the lock over top sticks up too high, and interferes with other items in the cockpit
3. The liner keeps coming out when unpacking what a pain

No such problems with the regular stemcell - I can't say this is worth the extra money.

On another note the really! really! harsh Velcro, has already started to wear a hole in the outer bag after only two days, and has trashed another bit of kit, put it on soft side inside (no Scratching the bike, but damages the kit, put it on soft side outside, it scratches the bike paintwork!)