Kink Engineering

Back Zipper Entry - M2M Sleepsack


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This back-entry sleepsack is totally bespoke to you starting from your measurements to the final finishes.

These are meant to fit tight! 3-way, 1-way standard or 1-way locking zipper(s) open up this enticing encasement to slide into.


  • Internal sleeves: Enhanced arm constrictions. 
  • Electrical/ enema port: 1-2" sleeves attached to 1 ¾” holes. Allows cords and tubes to exit the sleepsack comfortably.
  • Open Penis Sleeve: A latex sleeve custom-sized to hug the penis similar to a condom except head is uncovered.  
  • Cock AND Ball Gasket: Custom-sized non-stretch latex cock & ball ring that sits on the pubic bone.
  • Genital Access: Regular or locking 9” zipper at the front.
  • Check out a detailed description of our gasket options here.

After ordering, we will contact you to ask for the required measurements. Please make sure that the e-mail address you check out with is correct.

**Any of our hoods are available made-to-match.  


5 out of 5 (based on 2 ratings)
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Absolutely amazing

Incredible product. Fits perfectly, so well made and fun to use. Easy to put on, with a little help, and once zipped in no way out. Shipped on time and arrived a few days earlier than expected. Just an amazing experience overall and so happy with my first purchase from K.E. Will be back for more :D
Posted by Kasey, Aug 10th 2022

Back zip made to measure sleepsack

Amazing quality and perfect fit.
Posted by Shaun, May 9th 2022