Unusually for Hypnos mattresses, more detailed information of composition and gsm for this particular mattress is available in the public domain. Available in firm or medium tension, it is described as having a 3-zone UltraSens™ spring system with ReActive™ 14-turn pocket springs (not further specified) with the following upholstery: 2800 gsm wool (not further specified), 800 gsm wool & cashmere blend (not further specified) and 2000 gsm horsetail, with 3 rows of hand side-stitching, and the following further features: hand-tufted; Belgian damask cover; flag-stitched handles; chrome air vents; turnable. This seems, having read much of your website, to represent a reasonable mid-range mattress with appropriate materials; RRP is £1350. Since it appears to be fully turnable in both planes, it offers the promise of reasonable longevity. Am I missing any obvious drawbacks and what would be your nearest in-house John Ryan equivalent?