Ever tried to inflate your self-inflating sleeping mat or mattress with a regular air pump, only to find the adapter doesn’t fit? Using your mouth to inflate them is no fun. As the one in charge of preparing four sleeping pads for my family, I’ve been there. With this adapter, I can now inflate the pads using standard air pumps. The orange soft gasket is secured by a hidden groove, ensuring it stays put during use. It prevents air leaks and provides enough friction to 'twist and close' the mat's valve after full inflation, maintaining firmness. I printed the adapter body with PLA and the gasket with 95A TPU using a Bambu Lab A1 printer.

Dimension of the adapter:

Air Pump end: ID ∅17.75 mm (most air mattress pumps can fit into this end)

Sleeping Mat end: ID ∅21.30 mm (mat/mattress valve OD ∅17 mm - ∅21.2 mm can fit into this end)

Hope this adapter will save you some breath when inflating your camping sleeping mats and mattresses.