This Voksi Explorer footmuff converts between car seat and stroller use and fits newborns up to 3y+, delivering year-round comfort as a stroller sleeping bag and car seat cozy. This sleeping bag blends a wool-backed lining for natural moisture regulation with a 70/30 down/feather upper fill and 100% wool lower filling, plus a soft cotton inner and durable 100% nylon outer treated with BIONIC-FINISH ECO to repel water, snow, and wind, and all materials are OEKO-TEX Standard 100, Class 1 certified. This design includes an adjustable hood drawstring, side openings that fold down for ventilation and a clear view, a separable back that doubles as a stroller liner or play mat, and an anti-slip backing for secure placement. This model features a quick-release zipper for fast access, allows the harness to sit closer to the child to support safer restraint in car seats, and has been crash-tested with BeSafe rear-facing car seats, with 2025 updates improving the foot end and hood.