They are shit, sadly. One of mine punctured by itself, unridden. Returned on warranty. Asked Merlin if I could have another one, they said they’d stopped stocking them due to all the warranty claims.
The other one lasted a little longer, 3 or 4 rides, before it flatted. To be fair, it was being downhill raced, I reckon a standard tube might possibly have flatted. But certainly it was no more durable than a normal tube.
I don’t think it was repairable- the hole was large and ragged, it seemed to tear as it punctured. It’d need a bloomin big patch
I’ve got a set in a DH bike which I put in about 6 months ago, and they’re still fine. As above, it definitely seems to be hit and miss with them.
Everyone I’ve heard of who’s had them fail has been able to get a refund or replacement under warranty though.
It’s a shame, as the idea’s really good, and if they can pull it off consistently then they’ll be brilliant- just needs some QC issues addressing first.
Not Eclipse, but I have Foss tubes in my DH bike. 4 months on (with a week in the Alps) and no problems. I even put 2 decent dings in the rear rim with no pinch-flats.
Repairs are with Foss patches… no glue or faff. Peel the backing off, apply.