The SLR Boost is our saddle of choice due to its lightweight design and innovative use of materials. Product Details : Custom perforations and subtle branding integrates Selle Italia tradition and ENVE design. Upper material is made of a special polyurethane cover called Soft-Tek. Available in carbon and titanium rail versions. Two width options: 130 mm and 145 mm. Tech Specs: Weight 130mm : 130.5g, 145mm 134g Rail Carbon/Ceramic, 7×9mm Length 248mm Product SKU 130mm: 800-0000-401, 145mm: 800-0000-402 Ti Rail Weight 130mm : 161g, 145mm : 166g Rail Titanium, 7mm Length 248mm Product SKU 130mm: 800-0000-408, 145mm: 800-0000-409