diff --git a/src/components/mui/__tests__/mui-formik-quantity-field.test.js b/src/components/mui/__tests__/mui-formik-quantity-field.test.js
new file mode 100644
index 000000000..a73942773
--- /dev/null
+++ b/src/components/mui/__tests__/mui-formik-quantity-field.test.js
@@ -0,0 +1,68 @@
+import React from "react";
+import { render, screen, act } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { Formik, Form } from "formik";
+import "@testing-library/jest-dom";
+import MuiFormikQuantityField from "../formik-inputs/mui-formik-quantity-field";
+
+const renderWithFormik = (props, initialValues = { testField: [] }) =>
+  render(
+    <Formik initialValues={initialValues} onSubmit={props.onSubmit}>
+      <Form>
+        <MuiFormikQuantityField name="testField" {...props} />
+        <button type="submit">submit</button>
+      </Form>
+    </Formik>
+  );
+
+describe("MuiFormikQuantityField", () => {
+  it("must accept user input", async () => {
+    const onSubmit = jest.fn();
+
+    renderWithFormik({
+      label: "some field",
+      onSubmit
+    });
+
+    const field = screen.getByLabelText("some field");
+    expect(field).toBeInTheDocument();
+
+    const submitButton = screen.getByText("submit");
+    await act(async () => {
+      await userEvent.type(field, "12345");
+      await userEvent.click(submitButton);
+    });
+
+    expect(onSubmit).toHaveBeenCalledWith(
+      expect.objectContaining({
+        testField: 12345
+      }),
+      expect.anything()
+    );
+  });
+
+  it("must filter invalid characters", async () => {
+    const onSubmit = jest.fn();
+
+    renderWithFormik({
+      label: "some field",
+      onSubmit
+    });
+
+    const field = screen.getByLabelText("some field");
+    expect(field).toBeInTheDocument();
+
+    const submitButton = screen.getByText("submit");
+    await act(async () => {
+      await userEvent.type(field, "123eEe45");
+      await userEvent.click(submitButton);
+    });
+
+    expect(onSubmit).toHaveBeenCalledWith(
+      expect.objectContaining({
+        testField: 12345
+      }),
+      expect.anything()
+    );
+  });
+});
diff --git a/src/components/mui/formik-inputs/mui-formik-quantity-field.js b/src/components/mui/formik-inputs/mui-formik-quantity-field.js
new file mode 100644
index 000000000..133716542
--- /dev/null
+++ b/src/components/mui/formik-inputs/mui-formik-quantity-field.js
@@ -0,0 +1,30 @@
+import React from "react";
+import PropTypes from "prop-types";
+import MuiFormikTextField from "./mui-formik-textfield";
+
+const BLOCKED_KEYS = ["e", "E", "+", "-"];
+
+const MuiFormikQuantityField = ({ ...props }) => (
+  <MuiFormikTextField
+    type="number"
+    onKeyDown={(e) => {
+      if (BLOCKED_KEYS.includes(e.key)) {
+        e.nativeEvent.preventDefault();
+        e.nativeEvent.stopImmediatePropagation();
+      }
+    }}
+    inputProps={{
+      min: 0,
+      inputMode: "numeric"
+    }}
+    // eslint-disable-next-line react/jsx-props-no-spreading
+    {...props}
+  />
+);
+
+MuiFormikQuantityField.propTypes = {
+  name: PropTypes.string.isRequired,
+  label: PropTypes.string
+};
+
+export default MuiFormikQuantityField;
diff --git a/src/pages/sponsors-global/form-templates/sponsor-inventory-popup.js b/src/pages/sponsors-global/form-templates/sponsor-inventory-popup.js
index 9299b2325..f66bfd749 100644
--- a/src/pages/sponsors-global/form-templates/sponsor-inventory-popup.js
+++ b/src/pages/sponsors-global/form-templates/sponsor-inventory-popup.js
@@ -35,6 +35,7 @@ import {
   formMetafieldsValidation
 } from "../../../utils/yup";
 import AdditionalInputList from "../../../components/mui/formik-inputs/additional-input/additional-input-list";
+import MuiFormikQuantityField from "../../../components/mui/formik-inputs/mui-formik-quantity-field";
 
 const SponsorItemDialog = ({
   open,
@@ -226,7 +227,7 @@ const SponsorItemDialog = ({
                 <InputLabel htmlFor="default_quantity">
                   {T.translate("edit_inventory_item.default_quantity")}
                 </InputLabel>
-                <MuiFormikTextField
+                <MuiFormikQuantityField
                   variant="outlined"
                   name="default_quantity"
                   formik={formik}
@@ -239,7 +240,7 @@ const SponsorItemDialog = ({
                     "edit_inventory_item.quantity_limit_per_sponsor"
                   )}
                 </InputLabel>
-                <MuiFormikTextField
+                <MuiFormikQuantityField
                   variant="outlined"
                   name="quantity_limit_per_sponsor"
                   formik={formik}
@@ -250,7 +251,7 @@ const SponsorItemDialog = ({
                 <InputLabel htmlFor="quantity_limit_per_show">
                   {T.translate("edit_inventory_item.quantity_limit_per_show")}
                 </InputLabel>
-                <MuiFormikTextField
+                <MuiFormikQuantityField
                   variant="outlined"
                   name="quantity_limit_per_show"
                   formik={formik}
diff --git a/src/pages/sponsors/sponsor-form-item-list-page/components/sponsor-form-item-form.js b/src/pages/sponsors/sponsor-form-item-list-page/components/sponsor-form-item-form.js
index 0288b8d44..d2e350fc6 100644
--- a/src/pages/sponsors/sponsor-form-item-list-page/components/sponsor-form-item-form.js
+++ b/src/pages/sponsors/sponsor-form-item-list-page/components/sponsor-form-item-form.js
@@ -26,6 +26,7 @@ import useScrollToError from "../../../../hooks/useScrollToError";
 import MuiFormikUpload from "../../../../components/mui/formik-inputs/mui-formik-upload";
 import MuiFormikPriceField from "../../../../components/mui/formik-inputs/mui-formik-pricefield";
 import FormikTextEditor from "../../../../components/inputs/formik-text-editor";
+import MuiFormikQuantityField from "../../../../components/mui/formik-inputs/mui-formik-quantity-field";
 
 const buildInitialValues = (data) => ({ ...data });
 
@@ -41,7 +42,9 @@ const SponsorFormItemForm = ({ initialValues, onSubmit }) => {
       early_bird_rate: decimalValidation(),
       standard_rate: decimalValidation(),
       onsite_rate: decimalValidation(),
-      default_quantity: positiveNumberValidation(),
+      default_quantity: positiveNumberValidation().required(
+        T.translate("validation.required")
+      ),
       quantity_limit_per_sponsor: positiveNumberValidation(),
       quantity_limit_per_show: positiveNumberValidation(),
       meta_fields: formMetafieldsValidation()
@@ -119,7 +122,7 @@ const SponsorFormItemForm = ({ initialValues, onSubmit }) => {
               />
             </Grid2>
             <Grid2 size={4}>
-              <MuiFormikTextField
+              <MuiFormikQuantityField
                 name="quantity_limit_per_show"
                 label={T.translate(
                   "sponsor_form_item_list.edit_item.quantity_limit_per_show"
@@ -130,7 +133,7 @@ const SponsorFormItemForm = ({ initialValues, onSubmit }) => {
               />
             </Grid2>
             <Grid2 size={4}>
-              <MuiFormikTextField
+              <MuiFormikQuantityField
                 name="quantity_limit_per_sponsor"
                 label={T.translate(
                   "sponsor_form_item_list.edit_item.quantity_limit_per_sponsor"
@@ -141,7 +144,7 @@ const SponsorFormItemForm = ({ initialValues, onSubmit }) => {
               />
             </Grid2>
             <Grid2 size={4}>
-              <MuiFormikTextField
+              <MuiFormikQuantityField
                 name="default_quantity"
                 label={T.translate(
                   "sponsor_form_item_list.edit_item.default_quantity"