Great question—fit matters for comfort and performance. Base layers typically fit close to the body without feeling tight. To pick a size:

• Measure: Compare your child’s chest, waist, hips, and height to the size chart on each product page.
• Check ranges: You’ll see options from baby/toddler (6M–7T) to youth (2T–18) and XS–XXL.
• Consider the use: Compression pieces usually run snug; thermal waffle or fleece sets may allow a little layering room.
• Read reviews: Many shoppers note whether items run small or large.
• Details matter: Look for stretch fabrics and elastic waistbands in the description.

You can also use filters to narrow by size and choose pickup or delivery at checkout.

Each fabric style supports a different need:

• Waffle thermal: A textured knit that can help trap air for cozy everyday warmth.
• Fleece-lined: Soft interior that may add extra insulation, useful for colder days.
• Compression: Smooth, stretchy layers designed to be snug and moisture-wicking, popular under sports uniforms.
• Merino wool: A natural fiber known for breathability and comfort across varying temperatures, often chosen for skiing or hiking.

For training days, lightweight quick-dry synthetics are common. For casual winter wear, thermal or fleece-lined sets are frequent picks. Filter by fabric type on the page to find what fits your child’s routine.

Think in three parts, then adjust for the day:

• Base: A snug, moisture-wicking layer (compression or thermal) to manage sweat.
• Mid: Fleece or another insulating piece for added warmth.
• Outer: A wind- or water-resistant jacket for the elements.

For school, a thermal set under a tee and hoodie can be comfortable without bulk. For sports, compression tops and leggings work well under jerseys or pads. On milder days, you might skip the mid-layer. Product pages often indicate weight (like mid-weight) to help you fine-tune. You can choose pickup or delivery for convenience.

Care varies by fabric, so the garment label is your best guide. In general:

• Synthetics/compression: Machine wash cold, gentle cycle; avoid fabric softeners as they may reduce wicking; tumble dry low.
• Merino wool: Use a mild or wool-safe detergent, cold wash; lay flat or line dry to help maintain shape.
• Fleece-lined: Wash inside out on a gentle cycle to help minimize pilling.
• Color care: Wash with similar colors; avoid bleach.

Pre-treat spots gently and check the product page for any specific instructions. These steps can help preserve performance, though results may vary with use and garment construction.

Look for lighter, breathable layers designed for activity:

• Moisture-wicking compression: Smooth, quick-dry tops and leggings that help manage sweat.
• Lightweight thermals: Choose thinner sets rather than heavy fleece-lined options.
• Ventilation features: Product descriptions may note mesh panels or airflow details.
• Merino options: Some families prefer merino for comfortable temperature range during stop-and-go play.

Keep the fit close but not restrictive, and consider short-sleeve base layer tops for practice days. Use page filters like “quick-dry” or “lightweight” to narrow choices. Testing the outfit at home before a game can help you fine-tune the layering approach.