Versatile. Light-weight. Fitting. The ERGObaby Sport Carrier is composed of airy, durable cotton/poly blend fabric and features a back vent for extra breathability€so baby and parent stay cool and happy. The waist belt and shoulder straps have extra inches beyond our other models to suit all sizes and fits. Whether climbing a hill or the stairs, this Carrier makes the experience more enjoyable for all. Balanced weight distribution: Evenly-managed baby weight between parent's shoulders and hips for ultimate comfort Ergonomic: Proper facing-in spread-squat seating position supports baby's hip, pelvis, and spinal development Carry positions: 3 positions - Front, Back, and Hip carry Usage Range: Carries babies from infancy (7 lbs. / 3.2 kg to 12 lbs. / 5.5 kg with Infant Insert) or up to 4-5 months to maximum 45lbs / 20kgs Works with Infant Insert? Yes. Accessory Compatibility: Infant Inserts, Backpacks, Front Pouches, Teething Pads, Weather Covers Buckles: Custom-logo, high-test strength Webbing straps: Premium quality, nylon Stitching: Reinforced at all fabric intersections for extra durability Reinforcements: Interior interfacing at critical intersections for added safety Machine washable: Cold with mild detergent on gentle cycle. Dry on delicate cycle and remove when seams are still damp. Air dry. Carrier body: 65% polyester, 35% cotton Carrier lining: 100% cotton poplin Carrier weight: 1.21 lbs / 550 grams. 1/3 lighter than ergobaby Original Carrier. More breathable and lightweight. Sleeping Hood: Detachable, snap-in; 100% cotton poplin with elastic edging and snap-to-strap attach. Supports baby's head while sleeping and protects from sun and wind. Adjusts in length with 5 snap levels for growth of baby. Shoulder straps: Padded with 1in high-density premium foam, expanding from 27in - 49in Waist strap belt: Padded with 1/4in high-density EVA foam, expanding from 23.6in - 51.18in / 60cm - 130cm, an additional 5.9in / 15cm over the ergobaby Original Carrier. Chest strap: Sliding adjustment Fill: 100% cotton batting in body of carrier to soften edges Small stuff pouch, doubles as storage for Sleeping Hood Slit-vented front of carrier: A cooler ride for baby