In my search for large Comply TSX400 tips at a reasonable price I came across these Professor Beats Ear Sweets*. After some hesitation the lower price and extra pair won over the dodgy name and garish colour and I bought a pack of large ones hoping they would fit, which they do. They arrived quickly and I've had them in daily use for a week now on my Tzars and I'm impressed - they are just as comfortable and isolating as the Complys they replaced and with them fitted backwards there is only about 1mm of tube sticking out over the end of the earpiece so there is little to no effect on the sound (I've used Complys for so long I don't remember anything else. Unfortunately my old pair were ready for the bin so I can't directly compare...) Will they last? Only time will tell, but they still look good as new after a quick rub with a damp finger (the yellow does look dirty easily) and there's no sign of the foam detaching from the tube so I am hopeful. Complys usually last me about a month so I will report back how they're holding up in three weeks or so. If you're in the market for some new foam tips for your large bore 'phones I would consider these! * I have no affiliation with this seller, I'm just a happy customer.