Virtually all of the major bedding manufacturers have either gone totally to that design, abandoning the two-sided design, or have allotted a healthy percentage of their products to it. mattress construction appears to be a one-sided issue
Bird Spider and Bird Eating Spiders. The Chinese bird spiders are venomous spiders capable of delivering a rather dangerous bite. Their LD50-value is low and in the same range as many loxosceles species (brown recluse spiders). Chinese bird spiders are tarantulas, just like the goliath bird eating spider is a tarantula. Chinese bird spiders are widely distributed in Asia and are abundant in Southern China.
They almost look like the tarantulas. There are different kinds of wolf spiders too. You can identify them by looking through the pictures. A wolf spider grows to an average size of 1.2 inches.