Silk base layers feel amazing against the skin—they're incredibly smooth, lightweight, and pack down to almost nothing, which makes them great for travel or layering under tight-fitting ski clothes. If you're doing casual resort skiing on milder days or want a luxurious next-to-skin feel, silk can definitely work.
The trade-off is durability and moisture management. Silk doesn't wick sweat as effectively as merino wool or synthetic polyester, so during high-output skiing or cold, sweaty days, you may end up feeling damp. It's also the least durable option and can wear through quickly if you're moving around a lot or washing frequently.
Silk is best thought of as a specialty choice—ideal for mild conditions, travel, or short resort sessions where comfort and packability matter more than heavy-duty performance. For most skiers riding all day in variable conditions, merino wool or a wool-synthetic blend will serve you better.