I stupidly bought one of these. Gave it away ! So uncomfortable ! Back ache, leg ache, and the seat is too narrow, kept catching legs on chair legs. Useless. Now got korum s 23, much much better
Hi. It’s the small Matrix support side tray. Measures 40cm by 40cm. It also fits in between the Matrix chair once folded making it easy to store. Tight lines 👍🏻