2 Pack Replacement Compatible with N30i, Adjustable Strap for N30i and P30i, Great Value Supplies by Medihealer.

Very nice! Design is a tad different from the original, but works flawlessly. Very good fit and secures perfect. Thank you!

Name branded CPaP products are expensive so I look for well rated generics. This back strap is well made and works well on the N30i. I have purchased these several times and have been happy with the purchase.

These work with my cpap headgear, resmed p30i. The Velcro is strong and holds well. I usually replace every 6 months as the fabric and Velcro stretch out. I found this to be the best price at time of purchase.

Great quality strap. Surface is very smooth and slips on head.

I use these straps in my resmed machine. Nice and tight and sturdy.

These work great and a great price.

These straps feel better than the original. The Velcro sticks better and they seem really durable.

These work better for me than the original Resmed brand headgear that came with my N30i mask. These stay in place on my head much better, they don't slip on my hair, not much at all. These also have more area that the velcro can stick to, so more adjustment is possible, to fit more heads. I have a size small mask in spite of being a taller, larger woman, and at first I was thinking these might be too big, but they are not. These also are a much better value for the price!