Article Summary
Choose the layer by where the wool touches you and what you want to show at the neck. Check for bulk or pulling before adding thickness.
Cover the Places Where the Wool Rubs
Wear a thin layer that covers the places where your wool sweater rubs. A soft tee may be enough if only the body of the knit feels rough. A long-sleeved base layer covers the inner arms. If the irritation is at the neck, choose something with enough height to sit between your skin and the wool. A low-neck tee can hide underneath while leaving the irritated area exposed.
Check where you feel the contact. A sweater can feel fine standing still and bother the inside of the elbows after you have been at a desk. If the wrist is the problem, a long sleeve that ends short of your sweater cuff will leave that point uncovered. Use a light, smooth fabric you already know you can wear comfortably. Choose the coverage first, then the weight.
If the sweater feels comfortable against your skin and sits well on its own, you can skip the extra layer. A shirt with a thick seam can make a close-fitting knit feel tighter. Under a warm coat, a second layer may make the whole outfit warmer than you want indoors.
Choose Which Neckline You Want to See
If you want the layer hidden under a V-neck sweater, choose an opening that stays below the sweater’s edge when you reach. Pure Fashion offers V-neck and Henley options with different sleeve lengths. On a Henley, check that the button band lies flat where the sweater’s V ends.

If you want the shirt collar to show under a crew neck, pull both points above the knit. Turn your head and see whether they stay even. If one point keeps folding in, try a softer collar or a sweater with a wider opening. Numi’s layering guide shows other neckline shapes you can compare.
Check the Two Layers in Motion
A button cuff can bunch inside a narrow sweater sleeve as you bend your elbow. If you want to wear a collared shirt, make sure its cuffs can slide through the knit without catching.
Try the combination you plan to wear. Reach forward, then bend both elbows and let your arms fall. See if the underlayer gathers at the shoulder, turns out of the cuff or moves the sweater’s neckline. If the upper back pulls in a combination you otherwise like, try a thinner shirt or a roomier sweater rather than pulling the layers down each time.
Judge the Layer With the Sweater On
Try the two pieces with the coat you actually use. When the sweater and shirt fit together indoors but the coat sleeve binds, reducing bulk at the wrist can solve the problem without changing the neckline.
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If none of your shirts lies flat under the sweater, use the sweater shapes guide to compare neck openings and sleeve shapes. The side views in the knitwear collection can show where a sweater has room through the upper arm.