I got this latex sleeping bag (attachments). When I got it, I paid around 150 Euro, now it is around 250 from a different supplier (but same pictures), so don't bother looking for it, unless you can afford it. The new idea should work with almost any sleeping bag. It has a three-way zipper on the back and is very snug and actually the perfect length for me. Just not quite as figure-hugging as on the pictures.
The vanilla experience first:
I leave the lowest zipper down - which is a bit below my crotch. The upper zipper has to be about 10 cm from the top and last one a bit lower, with a draw-string attached. Then I enter my head through the collar and close it (pull up the upper zipper). The upper zipper likes to slide up and is inoperable then, so I keep the draw-string tight from this moment on - creating tension downwards (hard to create any other tension anyway). Then I enter my legs one by one and pull up the bag as far as possible. While still keeping the draw-string tight, I get my shoulders into the bag. Now I stand up carefully and let my bottom slide inside as well. This puts the bag under quite some tension, and the middle zipper would rush up right away, if not held in place. Once this is done, I pull the middle zipper down to my hands, remove the draw-string and push it down to the lower zipper. This is not really inescapable, but - on my particular bag - I have to grab the zipper from the outside (through the latex, which is quite thick and tight, to pull it up the first few centimetres - a challenge for the unaware. Actually, the first time, I rotated the entire bag 180° to get access to the neck zipper, because I thought, the other zipper was stuck 😉 . If you want more of a challenge, you could use a small padlock to attach the lower and middle zipper. you can still rotate the bag, but you could even secure the upper zipper with a chain around your neck (careful, lose chain!). Or you lock your hands together and drop the key (perhaps inside an ice-block) into the foot compartment, where it is hard to reach... Well, it sounds less exciting than it is for me - even without added security.
The new idea:
I got inspired by a second life sleeping bag, see here: https://www.likera.com/forum/mybb/Thread...4#pid17524 .
The idea is to tie a belt around the bag, while my arms are in the box-tie position. Since the bag is quite tight, I should not be able to move my arms anywhere else. Big question was "how?". Putting on a belt from inside is quite impossible, and slipping into a prepared belt (with tightening gizmo / string) as well. For a first test, I hung a loop of rope around my neck, dangling at a suitable hight on my chest, then made a slipknot-loop, loop going through that first loop and (later) around the bag. I kept the second loop quite wide to get into the bag, then, before closing the zipper, I pulled the slip-knot fairly tight, so I could still close the zipper - after hanging the end of the slip-knot onto a door-handle. The first try failed, the loop went too low. For the second try, I put the pulling end of the slip knot on my back, opposite to the "holding loop". Like that, one side of the loop was on the right position anyway and - with the help of the door handle, I could get the other side into position as well. I then tried again - arms in box-tie position, pull the loop tight. The result was good, my arms were locked. Of course, the simple slip-knot didn't hold much and the loop widened quickly. But my first goal, check the principle idea, was reached. I have a one-way belt, that will make it quite secure. And with the right precautions, I can open it later - it only needs a string at the right part of the buckle.
By the way, I tried the "armbinder swimsuit" in the bag too. No difference to the swimsuit alone, it is absolutely insecure.
The vanilla experience first:
I leave the lowest zipper down - which is a bit below my crotch. The upper zipper has to be about 10 cm from the top and last one a bit lower, with a draw-string attached. Then I enter my head through the collar and close it (pull up the upper zipper). The upper zipper likes to slide up and is inoperable then, so I keep the draw-string tight from this moment on - creating tension downwards (hard to create any other tension anyway). Then I enter my legs one by one and pull up the bag as far as possible. While still keeping the draw-string tight, I get my shoulders into the bag. Now I stand up carefully and let my bottom slide inside as well. This puts the bag under quite some tension, and the middle zipper would rush up right away, if not held in place. Once this is done, I pull the middle zipper down to my hands, remove the draw-string and push it down to the lower zipper. This is not really inescapable, but - on my particular bag - I have to grab the zipper from the outside (through the latex, which is quite thick and tight, to pull it up the first few centimetres - a challenge for the unaware. Actually, the first time, I rotated the entire bag 180° to get access to the neck zipper, because I thought, the other zipper was stuck 😉 . If you want more of a challenge, you could use a small padlock to attach the lower and middle zipper. you can still rotate the bag, but you could even secure the upper zipper with a chain around your neck (careful, lose chain!). Or you lock your hands together and drop the key (perhaps inside an ice-block) into the foot compartment, where it is hard to reach... Well, it sounds less exciting than it is for me - even without added security.
The new idea:
I got inspired by a second life sleeping bag, see here: https://www.likera.com/forum/mybb/Thread...4#pid17524 .
The idea is to tie a belt around the bag, while my arms are in the box-tie position. Since the bag is quite tight, I should not be able to move my arms anywhere else. Big question was "how?". Putting on a belt from inside is quite impossible, and slipping into a prepared belt (with tightening gizmo / string) as well. For a first test, I hung a loop of rope around my neck, dangling at a suitable hight on my chest, then made a slipknot-loop, loop going through that first loop and (later) around the bag. I kept the second loop quite wide to get into the bag, then, before closing the zipper, I pulled the slip-knot fairly tight, so I could still close the zipper - after hanging the end of the slip-knot onto a door-handle. The first try failed, the loop went too low. For the second try, I put the pulling end of the slip knot on my back, opposite to the "holding loop". Like that, one side of the loop was on the right position anyway and - with the help of the door handle, I could get the other side into position as well. I then tried again - arms in box-tie position, pull the loop tight. The result was good, my arms were locked. Of course, the simple slip-knot didn't hold much and the loop widened quickly. But my first goal, check the principle idea, was reached. I have a one-way belt, that will make it quite secure. And with the right precautions, I can open it later - it only needs a string at the right part of the buckle.
By the way, I tried the "armbinder swimsuit" in the bag too. No difference to the swimsuit alone, it is absolutely insecure.
