Knee-high boots are always popular for fall, shielding legs during the chilliest months, but once the weather warms up, they’re usually swapped for sandals. Designers decided to marry the two shoes for spring 2013. At Altuzarra, a stiletto gladiator version featured beaded leaf segments that add evening sparkle, while Proenza Schouler’s downtown take was tightly laced and black. And across the pond at Acne, a lavender version was buckled to the knee. Now the question is — bootals or sandoots?