Yeah recped, I saw that 26L one. It's 3" too wide, but it could work with a strap I suppose. I also checked my old camp chairs and a couple were close, but alas, the seams on the bottom were all ripped up. Seems to be what goes first with those chairs.
Interesting, we have a collection of old chair bags, all still in relatively good shape. The chairs are long gone, but the bags get repurposed for one thing or another. I used one a few weeks ago as a storage bag for a DIY spray cover. That cover incorporated attached rigid stays, so it wouldn’t go in a standard stuff bag, but it rolled up and slid inside an old chair storage bag with ease.
About straps on self-inflating sleeping pads, we use a strap every time, around the pad, not the bag. The strap keeps the pad tightly compressed, so once rolled so it slips into the stuff bag or dry bag easily. It also provides some assurance that, if the pad somehow inflated inside the stuff sack or dry bag, I’d still be able to extract it without a struggle or slicing the bag apart. Double sided Velcro strap cut to length works fine.
https://www.walmart.com/ip/VELCRO-Brand-ONE-WRAP-Roll-12ft-x-3-4in-Roll-Black/19535849
Just remember to toss the strap inside the empty bag when not in use, so it’s not Velcroed to your dirty socks or lost amidst the clutter of gear in the tent.
But making a custom DIY dry bag is, to me, a much better solution.
DIY dry bags for a sleeping pads have several advantages; waterproof of course, sized to the exact length and girth you need, custom features like corner grommets on the bag, less expensive than manufactured sleep pad dry bags (if you could even find one in the size desired), and no sewing. If you can use a household iron - the
only thing I have ever ironed is heat sealable fabric - you can make dry bags.
Seattle Fabrics heat sealable material
https://www.seattlefabrics.com/Heat-Sealable-Nylons_c_80.html
For a sleeping pad dry bag you do not need the 400D Packcloth, the Oxford cloth or even Tafetta will work fine. For storing something hard, like chair or instrument, I’d spring for the Packcloth.
Excellent instructions and diagrams from Chuck Holst
https://www.paddlewise.com/topics/boatequip/drybag.pdf
Photos and blather from the notorious keyboard pounder ;-)
http://www.canoetripping.net/forums/forum/general-paddling-discussions/diy/83031-making-diy-dry-bags
Of all those instructions, most importantly, make a template first and once cut out fold it over to make sure everything is square, and use a board as an ironing “fence” for straight, even heat sealed seams. Label and save the template for future bags or improvements.
Again, like a broken record, making custom dry bags (or other gear) from that heat sealable material is a simple (if multi-step) process. The first dry bag was slightly imperfect, but continues in functional waterproofed service a decade later.
Since then we’ve made at least 20 DIY dry bags, half of them for friends. And, even more fun,
with friends; Chip will be spending a shop visit soon making a custom dry bag for his ALPS chair, and a smaller dry bag for his Camp Time chair, and Joel will be by this spring to make custom stem tapers for his Loon
It’s a fun project, and once you’ve made one you will suddenly find the need to make more, so you might as well order extra fabric.