The Reima Lani Thermal set is a high-performance base layer designed to keep active children warm and dry during winter. Made from fully synthetic materials with Thermolite® technology, it efficiently wicks moisture away from the skin, preventing chills even during vigorous play. Trusted by professionals since 1995 and recognized as the best mid-layer in 2023 and 2025 consumer tests, this set offers reliable insulation and comfort for outdoor activities. Available in a wide range of sizes, the Lani Thermal set is the ideal foundation for layering in cold weather.