The chill-preventing base layer for active movers. When running around in winter, small choices make all the difference - particularly on chillier days. We introduced a fully synthetic base layer set in 1995 to keep professionals of play drier and warmer, and active families have trusted it ever since. Cotton chills kids when moist, but the warm Lani base layer set with Thermolite transfers moisture away from the skin. It keeps kids comfortable, no matter how many trees they climb, snowmen they build, or slopes they slide. Because the Lani kids' thermal set is the base we build our winter attire on, Reima offers it in a wide size range from toddlers to teens.