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.

About our chlorination: We've developed a unique 2-step chlorination process that locks a high shine coating onto the surface, unlike most chlorination that can leave garments dull and somewhat patchy. 

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.If you would like a hood in a Radical Rubber colour to match your sleepsack please contact us at to check colour availability and for further instructions.



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, 2022 Aug 10th

Back zip made to measure sleepsack

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