SQlab 611 Infinergy Ergowave active 2. 1 ltd. ION Saddle Energy Returns. Pressure Doesn't. Long days in the saddle expose every weakness in your contact point setup. The 611 Infinergy Ergowave active 2. 1 ltd ION addresses that with a padding core made from BASF's Infinergy expanded TPU foam, a material that rebounds faster than traditional foam and holds its shape over time rather than packing down after a season of hard use. The Ergowave profile adds a subtle step between the rear seating area and the nose, shifting soft tissue pressure away from the perineal zone without requiring you to change your position. The "active" element is a curved longitudinal profile designed to allow slight pelvic rotation with each pedal stroke, so your hips stay mobile across long efforts. Width is selected by sit bone measurement using SQlab's sizing process, and the ION rail spec keeps the overall weight lean without going full carbon. Features Infinergy expanded TPU padding BASF's energy-returning foam core rebounds faster than traditional PU foam and resists pack-down over time for lasting comfort and feel Ergowave step profile drops the nose relative to the rear seating platform to relieve soft tissue and perineal pressure without requiring a position change Active longitudinal curve allows slight pelvic rotation with each pedal stroke to reduce hip fatigue and keep you mobile across long rides ION rails lightweight hollow rail construction offering a performance weight advantage over standard Cr Mo at an accessible price point relative to carbon SQlab sit bone width sizing available in 13cm, 14cm, 15cm, and 16cm widths selected by measuring sit bone width and applying SQlab's discipline-specific offset ltd. ION designation limited-edition build spec combining the Infinergy foam core with ION rail material for a weight-conscious performance setup 611 series MTB-focused geometry shaped for trail and cross-country riding positions where pelvic mobility and pressure relief matter most across variable terrain Specifications Length NOT FOUNDWidth(s)13cm, 14cm, 15cm, 16cm Profile Ergowave active (step + curved longitudinal profile)Padding Infinergy expanded TPU (BASF)Shell NOT FOUNDRail Material ION (hollow rail)Rail Diameter NOT FOUNDCover Material NOT FOUNDCutout / Relief Ergowave step profile (no traditional cutout; nose drop relieves perineal pressure)Weight NOT FOUNDIntended Use XC, Trail | Sqlab | 611 Infinergy Ergowave Active 2. 1 Ltd. Ion Saddle | Multi | Color, 13Cm