.single-product .product-slider .slick-next, .single-product .product-slider .slick-prev {border-color: transparent #a8a7a7;}

.product-slider-thumb .slick-slide {
      margin: 0 5px;
  }

  .product-slider-thumb .slick-list {
      margin: 0 -5px;
  }

.single-product .product-slider div {
    background-color: #fff;
}

.single-product .product-slider .slick-next, .single-product .product-slider .slick-prev {
    z-index: 1;
}