The 614 Version features the Active system which offers more movement, which helps mobilise inverterbral discs with a clear noticeable difference when riding. It's especially good on rough roads and trails as well. Like all SQlab saddles the 614 has that "sweet spot" that will work with all types of riders. The Ergowave 614 Active is the saddle aimed towards gravel riders. It's similar to the 611 MTB saddle with the same thickness and padding density but the 614 gets a thinner waist (mid-section) which makes a big difference on gravel bikes where the position is definitely more pedal oriented and with more setback when it comes to geometry. This small tweak gives riders a bit more clearance in the thigh area while still maintaining the comfort of the 611 - you could say its a nice middle ground. A new and refined shape developed in collaboration with the University Hospital of Frankfurt and Frankfurt University. A specially designed shape works in unison with the human skeletal system allowing less gooch pressure and higher power outputs. Rather than a cutout running full length of the saddle which creates pressure spots the SQlab supports your sitbones while allowing up to 65% pressure relief. This saddle is equipped with SQlab’s "active" feature which refers to the customisable elastomer dampers on the rear saddle rails allowing a slight rocking movement of the saddle wings. The saddle comes supplied with three densities: soft, medium and firm allowing you to fine tune the movement to your preference and rider weight. The active feature allows for very subtle pelvis rotation while pedaling or grinding up steep climbs mobilising your spinal discs and effectively reducing the pressure to your sit bones. It also helps remove some of the trail irregularities. Starting with multiple widths and the raised tail isolates your sit-bones for better ergonomics. A wide, flat and blunt nose still remains comfortable when you are on the rivet. Try it for 60days and if you are not happy with the comfort for any reason, we'll give you a full refund. How do I know what size I need? Before purchasing a SQlab saddle you can order a free home fit kit to determine which saddle size you require. It will take into account your sit bone distance (the part where you contact the saddle) and also your style of riding which determines the degree of hip rotation. How does sizing work? Once you have your sit bones accurately measured you'll need to add 0, 1, 2,3 or 4cms to the sit bones measurement depending on your riding position. A more upright positions will add width. The more dynamic the riding position the more hip rotation and hence the narrower the contacting part of your sit bones and hence a narrower saddle will provide the correct fit. This works the same whether you are male or female SQLab Active Technology - Includes 3 hardness elastomers Width: 120, 130, 140, 150, 160mm Length: 275mm Weight: 231g (130mm) Rails: S-Tube MTB and Gravel Sitting positions: Stretched (+1cm), Moderate (+2cm) Unisex